As we reported earlier this month, most motherboard vendors' production schedules seem to indicate a mid-March release of Intel's next enthusiast-level X48 Express chipset. The rumor is that final silicon production is in full swing, and delivery to tier-one partners is occurring for product release in March - just in time for that lull between CeBIT and Computex. Recent delays in the release of X48 have given NVIDIA the breathing room they desperately need in order to prepare their upcoming 790i chipset, so we should see a near-simultaneous launch of the latest Intel based enthusiast offerings. History has shown us that even the smallest setback when it comes to the introduction of products intended to compete with a rival's new offerings can ultimately mean the difference between success and failure in the marketplace.

On one hand, NVIDIA knows their SLI technology has won the hearts and minds of a significant share of today's gamers and professional benchmarkers. Because of this, and somewhat against their will, Intel is forced to rely heavily on AMD's ability to positively establish their products as the leader in the high-performance graphics market. In the end, two major factors primarily determine which platform is "best" for the enthusiast: A) Just how well it ends up overclocking the latest processors and memory combinations, and B) graphics cards compatibility, including multi-GPU solutions. In an ideal world, we would be able to make our decision independent of the second point. Unfortunately, this has not been the case for some time now. NVIDIA's reluctance to extend SLI technology licensing to single-socket Intel platforms has resulted in a rather large conflict of interest for gaming enthusiasts worldwide - build around a less-than-stellar overclocking platform with amazing graphics performance, or forgo SLI altogether and concentrate on what we believe is a much more mature solution at this time, which only comes with owning an Intel chipset.

However, NVIDIA's day of reckoning is fast approaching. Their failure to open SLI to Intel chipset owners has made them less than popular in some circles, and with Intel just months away from introducing their next big platform interconnection technology (Quick Path), this could prove to be their undoing. Whether or not Intel offers NVIDIA a Quick Path license will effectively determine if NVIDIA's chipset development division will continue business as usual. Additionally, Intel's plans to soon enter the discrete graphics market, coupled with the possibility that NVIDIA may not receive a Quick Path license, may spell the end of SLI as we know it on the Intel platform in the near future.

If this scenario plays out, we would all likely be forced into a position where the purchase of a single component would then artificially limit some of the other hardware we could choose in order to complete our system builds. AMD would have their current Spider platform and next generation update, based on the combination of Phenom quad-core processors, AMD 7-series chipsets, and ATI Radeon 3800-4xxx series GPUs running in CrossFire (thanks to their late-2006 acquisition of ATI). Intel would offer next-generation Nehalem/Bloomfield CPUs on Quick Path motherboards, to be paired with one or more of their "Larabee" graphics cards. NVIDIA would be left to offer SLI support for their GPUs with 780/790 chipsets, and beyond that who really knows about the multi-GPU market. Without a doubt, there are interesting times ahead for this section of the market.

With Intel's X48 Express chipset launch less than one month away, ASUS has provided us with a near perfect sample of yet another great product for those looking to build their next ultimate overclocking system. Appropriately dubbed the "P5E3 Premium", this motherboard is much more than just a re-spin of their popular P5E3 Deluxe platform with the X48. The temptation for companies like ASUS to merely replace the X38 chipset with the pin-to-pin compatible X48 chipset and then remarket the board under a different name must be great. We would have a hard time giving a nod to the P5E3 Premium if this were the only change, especially to those that already own an X38 board. However, this is hardly the case. Simply looking over the board, we can find very few design layouts common to both the "Deluxe" and "Premium" variants of the P5E3. This is also reflected in the PCB revision silkscreened on the board, which has gone from 1.03G on the P5E3 Deluxe to 2.00G on the P5E3 Premium.

Some of the more notable improvements, which we will cover later in more detail, are the use of a 3-phase DDR3 memory power circuit as well as a 2-phase design for the MCH (Northbridge), something we have only previously seen on a few of the as-of-yet unreleased X48 boards from Gigabyte. We cannot say the decision to upgrade these power delivery systems surprises us; overclocking success is much more dependent on clean, reliable power lines than some might realize. Adding additional phases to a power regulation circuit is a great way to reduce the circuit's transient response time. For the user, this means the system is able to tolerate larger, faster total load changes, a crucial requirement in maintaining stability when components are being run well above their rated speeds. In addition, the extra current handling capabilities of the extra pair(s) of MOSFETs help to ensure the circuit does not become overloaded to the point of failure should an enthusiastic user decide to push their board far beyond recommended operating limits.

Although not directly marketed towards the extreme gaming crowd, the P5E3 Premium does well in that respect, matching other CrossFire solutions easily. Clearly, however, the focus is on overclocking and features. As with other X48 boards tested in this class, we had no problems running a 400MHz FSB stable overclock at stock MCH voltage (1.25V), which has become our somewhat de-facto test when it comes to judging a new board's worthiness to receive a more in-depth review. ASUS wisely chose to include their new MCH Read Delay adjustment BIOS features with this board, something we explored in detail in our ASUS ROG Rampage Formula review. They have also gone to great lengths to improve their CPU and Northbridge GTL (Gunning Transceiver Logic) tuning circuit implementations. Users now have the ability to tune GTL set points per die using much more precise stepping values (0.005x increments).

Now let's take a closer look at the design and layout of this board.

Board Layout and Features


View All Comments

  • lopri - Wednesday, February 20, 2008 - link

    I do not know the exact procedure or metrics for Editor's Choice award, but isn't it a little to early for a 'Gold' award? I don't even know if there are any other X48 board exist.

    And there is no mention of usability, or how well the included features all perform, or there is not even a single benchmark performed other than Everest shot. Indeed, it looks like the award was given simply because the reviewer was so impressed soley by the board's overclocking performance.
  • kjboughton - Wednesday, February 20, 2008 - link

    To date was have reviewed the following Intel X48 boards: Gigabyte GA-X48T-DQ6, ASUS R.O.G. Rampage Formula, MSI X48 Platinum and ASUS P5E3 Premium, which can all be found by navigating to the 'Motherboards' tab linked at the top of this page. Although we are certainly prepared to review any other boards that come forward, no other company has officially announced the existence of their X48-based product(s) at this time. Reply
  • DBissett - Wednesday, February 20, 2008 - link

    The specifications list DDR2 dividers....should that be DDR3? Reply
  • pnyffeler - Wednesday, February 20, 2008 - link

    I've been reading Anandtech for almost a decade now, and I've watched the fanboys, haters, and gurus go back and forth on lots of issues.

    Instead of talking about the substance of the article, I just wanted to say that you folks run the best online hardware review page on the planet, and this article is yet another example of the incredible work you do. Your attention to detail is impressive, but your genuine concern for getting to the bottom of issues and telling the readers how you really feel. That level of honesty breeds trust, which is a difficult commodity to come by in today's online world.

    Keep up the excellent work.
  • takumsawsherman - Wednesday, February 20, 2008 - link

    Thank God! I was afraid that Asus was going to use Firewire800 instead of 400. Make sure you keep using the 10 year old variant of the technology, ok Asus? Whatever you do, do not spend the couple of extra bucks to improve the speed of the interface. Heck, while you're at it, for a $250 board, why don't you just take away firewire altogether, and replace it with onboard video. That would be class. Reply
  • LEKO - Wednesday, February 20, 2008 - link

    Because manu people have a digital camera with FireWire output. For some (like me), I based my decision on FireWire availability... A board without FireWire is an handicapped board for me. Reply
  • takumsawsherman - Wednesday, February 20, 2008 - link

    I was being sarcastic. I use many firewire devices, mostly 400, some 800. It irks me that manufacturers insist on me buying 3rd party cards, even at this incredibly high price for a motherboard.

    They just want Firewire to go away so they can add a little to their margins.
  • Visual - Wednesday, February 20, 2008 - link

    I wonder how the situation will play out in the laptop segment. nVidia's chipsets have a feature that is very promising in that segment - namely their now non-optional integrated graphics card in combination with an addon card, and the ability to switch between the two without rebooting.

    My understanding is that all intel laptops so far are always made with an intel chipset (to qualify for their centrino brand), so we likely won't be able to benefit from these exciting features of the new nvidia chipsets. This is a shame.
  • Alex1180 - Wednesday, February 20, 2008 - link

    If I wanted to pair this mobo with the upcoming Q9450 what would be the best air cooling heatsink/fan solution to overclock the CPU and what speed would you recommend overclocking it to?

    any help would be appreciated
  • Super Nade - Wednesday, February 20, 2008 - link


    None of those caps are Nichion. The VRM caps are Fujitsu FP-Cap and the one by the EPS connector looks like a Sanyo SEPC.


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